{ "items" : [
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      "properties" : {
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        "http://www.w3.org/ns/prov#value" : [ "it is pretty easy to extract a HAR from WPT and then analyse it, the key is choosing which things to analyse e.g. slope might be interesting." ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "webpagetest.org" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/366077252"
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